He added that they _____ day and night for nearly a week to get the car going again.
A、had been working
B、have worked
C、have been working
D、worked
【正确答案】：A
【题目解析】：他们持续工作了近一个星期，有时间副词for nearly a week用完成时，一直在做此事表示进行用完成进行时，而added谓语是过去式，此事应发生在他说话之前，所以是过去完成进行时。
